Mechanical movement.



No. 597,100. Patehted Apr. 8, I902.

F. McKEAN. v

MECHANICAL MOVEMENT.

(Application filed. July 2, 1901.)

No Model.)

UNITED STATES PATENT @FFIQE.

FRANK MCKEAN, OF LOMETA, TEXAS.

MECHANICAL MOVEMENT.

SPECIFICATION forming part of Letters Patent No. 697,100, dated April 8, 1902.

Application filed July 2,1901.

To all whom it vita/y concern:

Be it known that I, FRANK MOKEAN, a citizen of the United States, residing at Lometa, in the county of Lampasas and State of Texas, have invented new and useful Improvements in Mechanical Movements, of which the following is a specification.

My invention relates to improvements in mechanical powers or movements, and has for its object the construction of a simple and comparatively inexpensive mechanism for converting rotary motion, like that of a wheel or pulley, into reciprocating motion; and for this purpose it consists of the combination and arrangement of parts hereinafter set forth and claimed.

In the accompanying drawings, forming a part of this specification, Figure 1 represents a side elevation, partly in section, of the mechanism forming my invention. Fig. 2 represents a plan view of a portion of the device, the supporting-standards of the block being in section. Figs. 3, 4, 5, and 6 represent side views of modifications of a detail portion of the device. Fig. 7 represents sectional and side views of another modification, wherein the crank is integral with the block, forming flanges thereon, and the rollers of the arms ride on said flanges. Fig. 8 is a sectional view of another modification, in which the operating-arm has its roller bearing on the inner face of the crank, the latter being formed in sections.

Similar letters indicate like parts in the different figures.

In Fig. 1, wherein the device is applicable to a drill, 1 designates a mast or standard having mounted on its upper end a pulley or wheel 2, and 3 3 designate standards, on which is j ournaled a shaft 4, carrying the pulley 5, which receives rotary motion by means of the belt 6 from any suitable motor or source of power. Rigidly secured on said shaft between the disks 7 7 is the retaining-block 8, surrounding which is the crank 9, consisting, as shown in Fig. 1, of an approximately rectangular (in cross-section) piece of suitable material, as metal, having an outwardly-extending offset on each of its opposite sides at opposite ends, said ofisets being designated as 9 and 9, respectively. Between the said crank 9 and the block 8 is an open space to Serial No. 66,823. (No model.)

permit the free-passage between them of the ant-ifriction-roller 10 on one end of the arm or link 11. The other end of said arm has a wheel or pulley 12 journaled thereon, the latter bearing against or resting on a cord 13, either of rope or other flexible material. The said cord has one of its ends connected to a drum 14 or other fixed point suitably supported on the standards 3 3 and has its other end 13 after passing over pulley 2, fastened to a drill or other tool. (Not shown.)

It will be seen that as the pulley 5 is rotated in the direction of the arrow, Fig. 1, the block 8 will hear at its ends against the inner face of the crank 9, causing the latter to rotate with it, and as the rollerlO is engaged in an offset 9* the arm 11 is carried downward, and with it the pulley 12, thus drawing down the portion of the cord 13 which is between the mast l and standards 3 3, thereby raising the drill or tool secured on the outer end of said cord. hen a half-revolution of pulley 5 is accomplished and the block 8 is in the position shown in dotted lines, Fig. 1, the roller 10 on the arm 11 will, owing to its position and the weight of the drill, become disengaged from the ofiset 9 and moving from said offset will pass upward between the block and the crank and enter the ofiset 9 on the opposite end of the crank. Owing to this upward movement of arm 11 and its pulley 12, and thereby the slackening of the pull or draw of said arm on the cord 13, the weight of the drill will cause it to descend, and thereby perform its work. The further and continuous revolution of the block repeats the operation hereinbefore described.

In Fig. 3 the form of the crank 15'is somewhat changed, but the operation of the crank is identical with that of the crank shown in Fig. l. The length of the drop of the drill is regulated by the length of the distance between offsets. Owing to the block being substantially, as shown in Fig. 1, of the same length as the distance between the olfsets, there is little ornoloss of power, only a change of direction.

With the modifications 16, 17, 18, having the offsets 16 17, and 18 respectively, as shown in Figs. 4, 5, and 6, there will be three, four, and six movements downwardly, respectively, of arm 11 and the corresponding nu mher of operations of the drill during one revand the said block the antifriction-rollers of an arm 11 operate.

The principle of the operation of the arm and crank is identical in the several modifications with that in the construction shown in Fig. 1, thediiference'being merely in the number of reciprocating movements of the arm, and consequently the number of operations of the connected drill or tool. It will be seen that the parts of the mechanism are few in number and easy of operation. While the mechanism has been described as operative for a drill, it may be used wherever a reciprocating movement is desired.

Having thus described my invention, what I desire to claim and secure by Letters Pat- 1. A mechanical movement or power, consistin g of a rotatable retaining-block, a crank on said block, means for rotating saidblock and with it said crank, an arm in successive engagement with portions of said crank by which the former is moved in one direction, and said arm adapted to move in an opposite direction at its disengagements from said portions of said crank; said parts being combined substantially as described.

2. A mechanical movement or power consisting of a retaining-block suitably jour naled, a crank mounted on said block and provided with offsets, means for rotating said block and thereby said crank, an arm having a roller adapted to be engaged successively in each of said ofisets during the rotation of said crank, thereby moving said arm in one direction, and said arm adapted to move in the opposite direction on the successive disengagements of said roller from said offsets; said parts being combined substantially as described.

- 3. In a mechanical movement, the combination of a shaft With a retaining-block secured thereto, a crank on said block rotatable therewith and provided with offsets, an arm having an end successively engaging said ofisets during the rotation of said crank thereby moving said arm in one direction, and

means adapted to be operated for disengaging the arm from the offsets and moving the same in the opposite direction; said parts being combined, substantially as described.

4. In a mechanical movement, the combination of a retaining block with a crank loosely mounted thereon, means for rotating said block and thereby said crank, an arm with a roller adapted to be successively engaged by'and be retained in offsets in said crank thereby moving said arm in one direction, and means including a flexible cord engaging the said arm for moving it in the 0pposite direction; said parts being combined substantially as described.

5. In a mechanical movement, the combination of the retaining-block and disks'suitably journaled, a crank loosely mounted on said block between said disks, and provided with offsets, an arm having a roller at one end adapted to successively engage in said offsets on the rotation of said crank thereby moving said arm in one direction, a flexible cord'having one end passing over a support and adapted for carrying a weight, and its other end secured to a fixed point, and a pulley secured to said arm and bearing on said cord; said parts being combined substantially as described.

6. In a mechanical movement the combination of standards with a retaining-block journaled thereon, means for rotating said block, a crank loosely secured on said block so as to-be engaged thereby and rotated therewith, said crank having at regular intervals offsets therein, an arm having at one end a roller adapted to be successively engaged in said offsets and carrying at its other end a pulley, and a flexible cord having one end passing over a support and adapted for carrying a weight, and at its other end fastened to a fixed point, said pulley on said arm bearing on said cord between the supports of the latter, substantially as described.

7. A mechanical movement having a rotatable crank, an arm successively engaged at different portions of said crank to which is imparted a movement in one direction and said arm adapted to move in the opposite direction at its disengagements from said portions of the crank; said parts being combined substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

FRANK MOKEAN.

Witnesses:

T. C. ALLEN,

W. D. GoocH. 

